MT9M034
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7
PIXEL DATA FORMAT
Pixel Array Structure
The MT9M034 pixel array is configured as 1412 columns
by 1028 rows, (see Figure 4). The dark pixels are optically
black and are used internally to monitor black level. Of the
right 100 columns, 64 are dark pixels used for row noise
correction. Of the top 24 rows of pixels, 12 of the dark rows
are used for black level correction. There are 1296 columns
by 976 rows of optically active pixels. While the sensors
format is 1280 × 960, the additional active columns and
active rows are included for use when horizontal or vertical
mirrored readout is enabled, to allow readout to start on the
same pixel. The pixel adjustment is always performed for
monochrome or color versions. The active area is
surrounded with optically transparent dummy pixels to
improve image uniformity within the active area. Not all
dummy pixels or barrier pixels can be read out.
Figure 4. Pixel Array Description
2 light dummy + 4 barrier + 24 dark + 4 barrier + 6 dark dummy
Dark pixel Barrier pixel
Light dummy
Active pixel
pixel
1412
2 light dummy + 4 barrier + 6 dark dummy
2 light dummy + 4 barrier + 100 dark + 4 barrier
1028
2 light dummy + 4 barrier
1296 x 976 (1288 x 968 active)
4.86 x 3.66 mm
2
(4.83 x 3.63 mm )
2
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8
Figure 5. Pixel Color Pattern Detail (Top Right Corner)
Active Pixel (0, 0)
Physical Pixel (122, 44)
Row Readout Direction
G
B
G
B
G
B
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
G
B
G
B
G
B
G
B
G
B
G
B
G
B
G
B
G
B
Column Readout Direction
Default Readout Order
By convention, the sensor core pixel array is shown with
pixel (0,0) in the top right corner (see Figure 5). This reflects
the actual layout of the array on the die. Also, the first pixel
data read out of the sensor in default condition is that of pixel
(112, 44).
When the sensor is imaging, the active surface of the
sensor faces the scene as shown in Figure 6. When the image
is read out of the sensor, it is read one row at a time, with the
rows and columns sequenced as shown in Figure 6.
Figure 6. Imaging a Scene
Lens
Pixel (0,0)
Row
Readout
Order
Column Readout Order
Scene
Sensor (rear view)
Digital Gain Control
MT9M034 supports four digital gains for the color
channels: Red, Green1 (green pixels on the red rows),
Green2 (green pixels on the blue rows), and Blue. Digital
gain control of the MT9M034 is dependent on the
configuration of the x_addr_start register. Table 4 illustrates
how the digital gains are applied when x_addr_start is even
or odd number.
Table 4. DIGITAL GAIN CONTROL FOR ODD AND EVEN X_ADDR_START (R0X3004)
Pixels x_addr_start Gain Register
Red
Even red_gain R0x305A
Odd green1_gain R0x3056
Green1 (on Red rows)
Even green1_gain R0x3056
Odd red_gain R0x305A
Green2 (on Blue rows)
Even green2_gain R0x305C
Odd blue_gain R0x3058
Blue
Even blue_gain R0x3058
Odd green2_gain R0x305C
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9
OUTPUT DATA FORMAT
The MT9M034 image data is read out in a progressive
scan. Valid image data is surrounded by horizontal and
vertical blanking (see Figure 7). The amount of horizontal
row time (in clocks) is programmable through R0x300C.
The amount of vertical frame time (in rows) is
programmable through R0x300A. Line_Valid (LV) is HIGH
during the shaded region of Figure 7. Optional Embedded
Register setup information and Histogram statistic
information are available in first 2 and last row of image
data.
Figure 7. Spatial Illustration of Image Readout
P
0,0
P
0,1
P
0,2
.....................................P
0,n1
P
0,n
P
1,0
P
1,1
P
1,2
.....................................P
1,n1
P
1,n
00 00 00 .................. 00 00 00
00 00 00 .................. 00 00 00
P
m1,0
P
m1,1
.....................................P
m1,n1
P
m1,n
P
m,0
P
m,1
.....................................P
m,n1
P
m,n
00 00 00 .................. 00 00 00
00 00 00 .................. 00 00 00
00 00 00 .................. 00 00 00
00 00 00 .................. 00 00 00
00 00 00 .................. 00 00 00
00 00 00 .................. 00 00 00
00 00 00 ..................................... 00 00 00
00 00 00 ..................................... 00 00 00
00 00 00 ..................................... 00 00 00
00 00 00 ..................................... 00 00 00
VALID IMAGE
HORIZONTAL
BLANKING
VERTICAL BLANKING
VERTICAL/HORIZONTAL
BLANKING
Readout Sequence
Typically, the readout window is set to a region including
only active pixels. The user has the option of reading out
dark regions of the array, but if this is done, consideration
must be given to how the sensor reads the dark regions for
its own purposes.

MT9M034I12STCH-S213A-GEVB

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Optical Sensor Development Tools 1.2 MP 1/3" CIS HB
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New from this manufacturer.
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